Welding torch



Patented Feb. 24 1948 UNITED STATESPATENT OFFICE WELDING TORCH Tony Svet, Cleveland, Ohio Application March 21, 1945, Serial No. 583,934

9 Claim's.

This invention relates to welding and cutting torches of the type in which combustible uid mixed with oxygen is delivered under pressure to the nozzle and in which the oxygen and combustible fluid are delivered through valve controlled passages to a mixing chamber so that the relative proportions of the fluids delivered to the nozzle may be regulated.

The main object of the present invention is to provide conveniently located valve actuators that can be quickly and easily manipulated to vary the character of the flame at the nozzle tip.

A further object of the invention is to provide valve actuators so constructed and so mounted on the torch body that they are not likely to be damaged by rough handling.

With the above and other objects in view, the invention may be said to comprise the device as illustrated in the accompanying drawings hereinafter described and particularly set forth in the appended claims, together with such variations and modications thereof as will be apparent to one skilled in the art to which the invention pertains.

Reference should be had to the accompanying drawings forming a part of this specification, in which:

Figure l is a side elevation of a torch embodying the invention,

Fig. 2 is an axial section through the torch body showing the same on an enlarged scale,

Fig. 3 is a side elevation of the nozzle coupling,

Fig. 4 is a side elevation of the central valve member looking toward a threaded end of the elongated head of the valve member and indicating the threaded ring which acts upon the head to adjust the valve member in dotted lines,

Fig. 5 is a side elevation of the tubular valve carrying member with the ring for adjusting the valve carrying member indicated in dotted lines,

Fig. 6 is a section taken on the line indicated at 6-6 in Fig. 2, and

Fig. 7 is a section taken on the line indicated at 1 1 in Fig. 2.

Referring to the accompanying drawings, the

torch of the present invention comprises a bodyy member having a conventional nozzle I that is carried by a hand grip portion 2 to which it is attached. The hand grip portion 2 may be in the form of a cylindrical tube closed by a suitable head 3 at its outer end and having tubes 4 and 5 therein that are attached to the head 3 and that extend through the inner end of the hand grip portion and terminate in nipples 6 and 'I to which ilexible tubes 8 and 9 may be attached such as acetylene from suitable storage tanks. The tubes 4 and 5 may be clamped to the inner end of the hand grip portion 2 by means of nuts IIJ and II. v

A passage I2 in the head 2 connects the outer end of the tube 4 with a recess I3 at the inner end of an internally threaded bore I4 formed in the head 3. A passage I5 alongside the bore It connects the outer end of the tube 5 to a counterbore I6 in the head 3. The nozzle I is attached to the hand grip portion 3 by means of a coupling member I1. The gaseous mixture is delivered to the nozzle I through a passage I3 that extends into the outer end of the coupling meme ber I1. The coupling member I1 has an axial bore I9 extending from its inner end that is of larger diameter than the passage I8. The inner end 20 of the coupling member I1 is externally threaded and Vscrews into the threaded bore i4 of the head 3.

Adjacent the inner end of the threaded portion 29 the coupling member I1 has radial apertures 2| that establish communication between the bore I9 of the coupling member and the surrounding space in the lcounterbore I6. Outwardly of the apertures 2I the member I1 has a cylindrical portion 22 of slightly larger diameter than the apertured portion and outwardly of the cylindrical portion 22 there is a second cylindrical portion 24 somewhat larger in diameter than the portion 22. An axially elongated slot 25 extends diametrically through the cylindrical portion 24 for a purpose that will presently be explained,

OutWardly of the cylindrical portion 24 the coupling member has a threaded portion 26 and a hex portion 21 by means of which the coupling member may be screwed tightly into the threaded bore I4.

The nozzle may be attached to the coupling member I1 in any suitable wav. As herein shown the nozzle is formed in sections the inner of which is attached to the coupling member I1 by threaded engagement with a threaded portion 28 at the outer end of the coupling member.

A cross head 29 is sldably mounted in the diametrical slot 25 and has a central threaded aperture 30 into which a stem 3| is screwed. The stem 3| has a sliding t in the bore I9 of the coupling member and has a lower end portion 32 of reduced diameter which provides a mixing chamber at the inner end of the coupling member where the apertures 2I are provided. At its inner end the stem 3l has a conical valve 33 that is adapted to close the passage I2 and the stem 3I is adjustable to regulate the flow from the passage I2 into the mixing chamber. The lower end portion 32 of the stem 3I has notches 32a formed on opposite sides thereof to provide at wrench receiving faces.

The stem 3l has an axial passage 34 that extends from its outer end and which registers with the passage I8 to the nozzle. The passage 34 terminates 'adjacenttheouter end ofthe reduced portion 32 ofA the stem and communicates with the space around the reduced portion 32 through lateral apertures 35. Fluid under pressure dellivered to the passage I2 passes into the recess I3 and into the lower end of the bore I9 ofthe coupling member I1 and thence through the apertures 35 into the passage 34 which delivers into the passage I8 leading `to the nozzle;

An externally and internally cylindrical tubujlar member 35 ts Within the counterbore I6 and upon the exteriork of the cylindrical portion 22 of the coupling memberV I1 and is adapted to slide axially within the counterbore I6 and upon the inner cylindrical member' 22. The tubular member 33 carries a conical valve 31 at its inner end that is adapted to closethe passage I and to regulate the flow from the passage I5' into the mixing chamber, the uid passing from the passage I5 into `the annular space surrounding the inner end of-the coupling member, through the apertures 2'I into the mixing chamber and from the mixing chamber 'through the apertures 35Y into the passage 34. A radially disposed pin 38 in the head 3 projects into the counterbore I6 and engages in a longitudinal slot 39 in thetubular member 33. The pin 38 and slot 39 serve to hold the tubular member 36 against turning movements and maintains the valve 31 in axial alinement with theY passage .I5.

Outwardly of the slot 39 the tubular member 35 has an externally screw threaded` portion 40 that is engaged by an internally threaded portion 4I of a thumb ring 42 that is adapted to be Vturned to adjust the tubular member 36 axially so as to regulate the flow of iiuid through the passage I-5. The thumb ring 42 is counterbored on the inner side to prov-ide a cylindrical flange 43 that ts upon a cylindrical bearing portion 44 at the outer end of the head v3, and, to make the con-4 nection fluid tight, a packing ring 45 may be interposed between the thumb ring 42 and the end of the head `3. The thumb ring 42 has a counterbore on its outer` side 'that provides an outer cylindrical flange 46.and an outer shoulder 41. A packing ring 48,-is seated on the shoulder 41 and a bearing ring 49 fits within the ange 4B and seats `against the packing ring 48. The bearing ring 49 is held against turning movements by means of a pin 50 that engagesV in an axial slot 5I in. the tubular member 33 and pro'- vides a bearing for an outer thumb ring, 52 that 'has an Iinternally threaded `portion 53 that engages screw threads 54 formed on the. ends of the cross head 29`for imparting axial movements and a shoulder 32 opposed to the end shoulder 59 of the thumb ring. A packing ring 63 is interposed between the shoulders 59 and 62 of the thumb ring and cap nut, and the cap nut is secured in adjusted position upon the coupling member by means of a lock nut 64 threaded on the portions 26 outwardly of the nut 60. The intertting rings 42, 49 and 52 are clamped together and held against axial movements between the nut 6B on the coupling member I1 and the outer end of the head 3, to which the coupling member I1 is attached.

By properly adjusting the cap nut 59, the thumb rings 42 and 52 and the intermediate bearing ring 4 9 may be clamped together with sulcient pressure to form fluid tight seals between them without clamping these members to an to the stem 3l and the valve 33 carried thereby.

The inner side of the ringA 52 is counterbored to provide a. shoulder 55V facing the outer end of the bearing ringY 49 and' a cylindrical ilange 56 that fits upon the outer end of the ring 49, suitable packing 51 being interposed between the shoulder 55 and the, outer end of' the ring 49. The thumb ring 52 has an outer cylindrical portion 58 and an end shoulder 59, and a cap nut 150 screwed on the threaded.' portion 26 of the coupling member has .a flange 6I that nts upon the cylindrical portion 58' of the thumb ring 52 extent su'icient to interfere with their independent rotation.

During operation ofL the torch, the operator gripping the portion 2 may engage the thumb rings 42 and 52 with his thumb or with his thumb and index iinger so that the two valvesy 32 and 31 may be instantly adjusted to change the character ofthe ame issuingfrom. the torch as desired.

Itis to be understoodthat variations and modicatlons of the specic'device herein shown and described for purposesl of illustration, may be made without departing from the spirit of the invention.

What I claim is:

1. A torch. comprising a body havinga hand grip portion with a nozzle attached thereto, said body having a mixing chamber communicating with the nozzle and two passages 4for supplying fluid to said chamber, two axially movable valve members having telescopically connected coaxial portions within said body, each valve controlling one of said passages and 'said' coaxial portions being screw threaded, means restraining turning movements of each valve member, a thumb ring for actuating each valve member, each ring having a screw thread engaging the screw threaded portion of a valve member,v andl means for holding each ring against axial movements.

2. A torch comprising abody having a hand gripportion with a nozzle attached thereto, said body having a mixing chamber communicating with said nozzle and'tWo passages delivering into the inner end of said chamber, an axially movable tubular member, a valve carried by said member for controlling one of said passages, and an axially movable valve member within said tubular member for controllingv the other passage.

3. A torch comprising a body' having a hand grip portion with a nozzle attached thereto, said body having a mixingV chamber communicating with said nozzle and two passages delivering into the inner end of said chamber, a xed tubular axially yextending guide member within said body, a tubular memberslid'able upon the exterior of said guide member, a member slidable upon the interiorof the guide member, said interior and exterior members having valve portions controlling said passages, and means for actuating said valve carrying members,

4. A torch comprising' a. body having a hand 'grip portion with a nozzle attached thereto, said body having a mixingchamber communicating with said nozzle and two passages delivering into the inner end of said chamber, a fixed tubular axially extending guide member within said body, 'a tubular member slidable upon the exterior of said guide member, amember slidable upon the interior of the guide member, said interior and exterior members having valve portions controlling said passages, and a pair of thumb rotatably mounted upon said body adjacent the nozzle attached end oi said hand grip portion and operatively connected to said valve carrying members to actuate the same.

5. A torch comprising a body having a hand grip portion with a nozzle attached thereto, said body having a mixing chamber communicating with said nozzle and two passages delivering into the inner end of said chamber, a fixed tubular axially extending guide member within said body, a tubular member slidable upon the exterior of said guide member, a member slidable upon the interior of the guide member, said interior and exterior members having valve portions controlling said passages, each of said Valve carrying members having a screw threaded portion, two independently rotatable thumb rings mounted on said body adjacent the nozzle attached end of said hand grip portion, said rings being coaxial with said hand grip portion and having screw threaded portions in engagement with the screw threaded portions of said valve carrying members, means for holding said Valve carrying members against rotation and means for holding said thumb rings against axial movements.

6. A torch of the character described comprising a hand grip member having a socket at its outer end that includes an internally threaded bore, a counterbore, a passage that opens axially into the inner end of the socket and a second passage that opens to the counterbore laterally of the threaded bore, a nozzle member having a tubular inner end screwed into said threaded bore and a passage communicating with said tubular portion, said tubular portion having lateral openings, a member slidable axially within said tubular end of the nozzle member and having a valve portion for closing said axial passage, an axially movable tubular member slidable in said counterbore exteriorly of the tubular inner end of the nozzle member, said tubular member having a valve portion for closing the passage.

to said counterbore, and means for actuating said Valve carrying members.

7. A torch of the character described comprising a hand grip member having a socket at its outer end that includes an internally threaded bore, a counterbore, a passage that opens axially into the inner end of the socket and a second passage that opens to the counterbore laterally of the threaded bore, a nozzle member having a tubular inner end screwed into said threaded bore and a passage communicating with said tubular portion, said tubular portion having lateral openings, a member slidable axially within said tubular end of the nozzle member and having a valve portion for closing said axial passage, an axially movable tubular member slidable in said counterbore exteriorly of the tubular inner end of the nozzle member, said tubular member having a valve portion for'closing the passage to said counterbore, two independently rotatable thumb rings adjacent the nozzle attached end of said hand grip member, and means operatively connecting one of said rings to each of said valve carrying members to actuate the same,

8. A torch of the character described comprising a hand grip member having a socket at its outer end that includes an internally threaded bore, a counterbore, a passage that opens axially into the inner end of the socket and a second passage that opens to the counterbore laterally of the threaded bore, a nozzle member having a tubular inner end screwed into said threaded bore and a passage communicating with said tubular portion, said tubular portion having lateral openings, a member slidable axially within said tubular end of the nozzle member and having a valve portion for closing said axial passage, said member having an externally screw threaded portion, an axially movable tubular member slidable in said counterbore exteriorly of the tubular end of said nozzle member, said tubular member having an externally screw threaded portion and a valve portion for closing said second passage, two independently rotatable thumb rings each having an internally threaded portion engaging the screw threaded portion of one of the valve carrying members, means for holding the valve carrying members against rotation, and means for holding the thumb rings against axial movements.

9. In a torch of the character described a hand grip member having an internally threaded bore at one end and a passage opening to the inner end of said bore, a nozzle member having an inner end portion of reduced diameter screwed into said threaded bore, said nozzle portion having an axial passage, the inner end of said nozzle member having an axial bore of larger diameter than said passage and a diametric'al slot, a cross head slidable axially in said slot said cross head having a central screw threaded opening and having ends projecting through the slots and provided with screw threads, a Valve member having its outer end screwed into said central opening of the cross head and its inner end of reduced diameter and provided with an end porv tion for closing said first mentioned passage, said valve member having an axial bore registering with the passage of the nozzle member and terminating short of the inner end, said Valve member having an opening from its axial bore to the space around the reduced inner end thereof, and a thumb ring having threaded engagement with said cross head for actuating the valve member.

TONY SVET.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,078,578 Gehring et al Nov. 11, 1913 2,232,772 Crowley et al. Feb. 25, 1941 FOREIGN PATENTS Number Country Date 301,416 Great Britain May 4, 1928 

